CN219930689U - Multidimensional damping damper of horizontal-turning open bridge - Google Patents
Multidimensional damping damper of horizontal-turning open bridge Download PDFInfo
- Publication number
- CN219930689U CN219930689U CN202320874170.7U CN202320874170U CN219930689U CN 219930689 U CN219930689 U CN 219930689U CN 202320874170 U CN202320874170 U CN 202320874170U CN 219930689 U CN219930689 U CN 219930689U
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- disc
- main shaft
- bearing bush
- shaped bearing
- bridge
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- 238000013016 damping Methods 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- 239000006260 foam Substances 0.000 claims abstract description 17
- 230000035939 shock Effects 0.000 claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model belongs to the technical field of vibration control of bridge structures, and provides a multidimensional damping damper for a swing-open bridge. The disc-shaped bearing bush is arranged on the main shaft, the disc-shaped bearing bush is locked on the damper shell by the anti-vibration pin, and the foamed aluminum shock-absorbing layer surrounds the disc-shaped bearing bush. When an earthquake occurs, the anti-vibration pin is sheared firstly, and the main shaft and the disc-shaped bearing bush squeeze the foam aluminum shock-absorbing layer along the horizontal direction. The foam aluminum damping layer has strong energy consumption and vibration reduction effects, and can absorb the kinetic energy of earthquake so as to achieve the purpose of vibration reduction; and the original rigid constraint between the main shaft and the bridge pier can be changed into flexible constraint, so that the influence of inertia force on the main shaft and the bridge pier is reduced. The disc-shaped foamed aluminum has strong energy consumption and shock absorption characteristics, small elastic modulus and good shock absorption performance for earthquakes from all directions, and the displacement of the main shaft relative to the bridge pier is controlled in a relatively safe range.
Description
Technical Field
The utility model relates to the technical field of bridge structure vibration control, and further relates to the technical field of bridge vibration reduction, in particular to a multidimensional vibration reduction damper for a swing-open bridge.
Background
Ping Zhuaikai the bridge is opened and rotated the in-process, is loaded through dead weight load, wind load and the load that probably takes place the earthquake of bridge through a main shaft. Because the inertial force of the upper structure under the working condition of earthquake action is very huge, the earthquake action is a key load working condition for controlling the design of the main shaft. In conventional designs, increasing the cross-sectional size of the main shaft and increasing the strength of the main shaft material are typically employed to resist shear and bending moments under seismic action. But this has the disadvantage that: the material waste of the main shaft is caused, and the construction cost is high; (2) The huge inertial force causes the bending moment and shearing force of the pier to be increased, and the size of the pier needs to be additionally increased.
Disclosure of Invention
Based on the defects of the design, the utility model provides a multidimensional shock absorption damper of a swing-open bridge. The main components comprise disc-shaped bearing bushes, foam aluminum shock absorption layers, damper shells and shock-resistant pins. When an earthquake occurs, the anti-seismic pin is sheared firstly, and the main shaft and the disc-shaped bearing bush squeeze the foam aluminum shock-absorbing layer along the horizontal earthquake acceleration direction. The foam aluminum damping layer has strong energy consumption and vibration reduction effects, so that the kinetic energy of an earthquake can be absorbed, and the purposes of damping and preventing collision are achieved; the original rigid constraint is changed into the flexible constraint between the main shaft and the bridge pier, and the influence of inertia force on the main shaft and the bridge pier can be reduced.
The technical scheme of the utility model is as follows: the multidimensional damping damper of the horizontal-turning open bridge is arranged between a rotating main shaft 5 and a pier 6 of the open bridge and comprises a disc-shaped bearing bush 1, a foamed aluminum damping layer 2, a damper shell 3 and a shock-resistant pin 4; a round hole is formed in the middle of the disc-shaped bearing bush 1, and a rotary main shaft 5 of the opening bridge passes through the round hole and is clamped with the disc-shaped bearing bush 1; the damper shell 3 is annular, is provided with an opening at the inner side, is sleeved on the disc-shaped bearing bush 1 and is fixed through the anti-vibration pin 4; the outer side of the damper shell 3 is spaced from the edge of the disc-shaped bearing bush 1, and the outer side of the damper shell is connected with the bridge pier 6; a foam aluminum shock-absorbing layer 2 is arranged around the disc-shaped bearing bush 1 in the damper shell 3; when an earthquake occurs, the shock-resistant pin 4 is sheared first, and the main shaft 5 presses the foamed aluminum shock-absorbing layer 2 along with the disc-shaped bearing bush 1 in any horizontal direction.
The foam aluminum shock-absorbing layer 2 is kept in a closely-adhered state with the periphery of the disc-shaped bearing bush 1.
When no earthquake occurs, the disc-shaped bearing bush 1 is always in close contact with the foamed aluminum shock-absorbing layer 2, the shock-resistant pin 4 firmly fixes the disc-shaped bearing bush 2 on the damper shell 3, the main shaft 5 of the opening bridge is rigidly restrained relative to the bridge pier 6, and the main shaft 5 can be ensured to be vertical.
When an earthquake occurs, the anti-vibration pin 4 is sheared firstly, and the main shaft 5 drives the disc-shaped bearing bush 1 to extrude the foam aluminum shock absorption layer 2 along the horizontal earthquake acceleration direction; the main shaft 5 generates controllable displacement relative to the bridge pier 6, and the original rigid constraint also becomes flexible constraint. The foam aluminum damping layer 2 has strong energy consumption and damping effects, can absorb the kinetic energy of earthquake, and achieves the purpose of damping; meanwhile, the rigidity constraint between the main shaft 5 and the bridge pier 6 is changed into the flexible constraint, so that the influence of inertia force on the main shaft 5 and the bridge pier 6 can be greatly reduced; in addition, although the disc-shaped bearing bush 1 can displace in the damper, the amplitude of the swing of the main shaft 5 in an earthquake is limited due to the constraint action of the foamed aluminum shock absorption layer 2, and the main shaft is completely controllable according to the design, so that the overturning of the whole opening bridge is not caused. By the method, the shearing force and bending moment of the main shaft 5 and the bridge pier 6 in the earthquake can be greatly reduced, so that the material consumption of the bridge pier 6 and the main shaft 5 is saved.
The utility model has the following effects and benefits: (1) The foam aluminum has strong energy consumption and shock absorption characteristics, so that acting force between the main shaft and the bridge pier can be rapidly attenuated under the action of earthquake; (2) The elastic modulus of the foamed aluminum is small, and the original rigid constraint between the main shaft and the bridge pier can be converted into flexible constraint, so that the influence of inertia force on the main shaft and the bridge pier is reduced; (3) The damper is disc-shaped and can absorb earthquake in different directions.
Drawings
Fig. 1 is a schematic diagram of a multidimensional damping damper for a swing-open bridge.
Fig. 2 is a schematic plan view of a multidimensional damping damper of a swing-open bridge.
Fig. 3 is a diagram of the mounting position of a multi-dimensional shock absorbing damper of a flat-turn open bridge on the open bridge.
In the figure: 1-a disc-shaped bearing bush; 2-a foam aluminum shock absorption layer; 3-a damper housing; 4-anti-vibration pins; 5-a main shaft; 6-pier.
Detailed Description
The following describes the embodiments of the present utility model in detail with reference to the technical scheme and the accompanying drawings.
Ping Zhuaikai the main shaft 5 of the bridge takes up almost all the upper structural load during opening and most of the load in the closed state, so that the main shaft 5 needs to take up very great shearing and bending moment effects in case of an earthquake. The multidimensional damping damper of the swing-open bridge is arranged between a main shaft 5 and a pier 6, wherein a disc-shaped bearing bush 1 is arranged on the main shaft 5, the disc-shaped bearing bush 1 is fixed on a damper shell 3 through a shock-resistant pin 4, a foam aluminum damping layer 2 surrounds the periphery of the disc-shaped bearing bush 1 and keeps a close-fitting state, and the foam aluminum damping layer 2 is arranged inside the damper shell 3.
Examples
A flat-turning single-tower double-cable-plane cable-stayed bridge is provided, the span is 110+220 meters, the width is 41 meters, and the main girder is a steel box girder. If the design is carried out according to the condition that no damper is added, the shearing force of the main shaft 5 can reach 24625kN in 8-level earthquake, and the shearing force and the bending moment of the bridge pier are respectively as follows: 33827kN and 938758 kN.m.
The damper is arranged between the main shaft 5 at the main tower and the bridge pier 6, when no earthquake occurs, the disc-shaped bearing bush 1 and the foam aluminum shock-absorbing layer 2 are always in close contact, the anti-vibration pin 4 firmly fixes the disc-shaped bearing bush 2 on the damper shell 3, the main shaft 5 of the opening bridge is in rigid constraint relative to the bridge pier 6, and the main shaft 5 can be ensured to be vertical.
When an earthquake occurs, the main shaft 5 bears the inertial force of almost the whole cable-stayed bridge, so that the anti-seismic pin 4 is sheared firstly, and then the main shaft 5 drives the disc-shaped bearing bush 1 to squeeze the foam aluminum shock-absorbing layer 2 along the horizontal earthquake acceleration direction; the maximum displacement of the main shaft 5 relative to the bridge pier 6 is 5.2cm, the original rigid constraint is changed into the flexible constraint, the influence of the inertial force on the main shaft 5 and the bridge pier 6 can be greatly reduced, at the moment, the shearing force of the corresponding main shaft 5 is reduced to 11081kN, and the shearing force and the bending moment of the bridge pier are respectively reduced to: 15222kN and 488155 kN.m. Since the disc-shaped bearing bush 1 is constrained by the foamed aluminum shock-absorbing layer 2 inside the damper, the maximum displacement amount thereof is controllable, and the foamed aluminum shock-absorbing layer 2 also plays a role in buffering collision. According to the design of the earthquake reaction of the damper, the bridge pier 6 and the main shaft 5 can save 40-50% of the material consumption.
Claims (2)
1. The multidimensional damping damper of the horizontal turning open bridge is characterized in that the multidimensional damping damper of the horizontal turning open bridge is arranged between a rotating main shaft (5) of the open bridge and a pier (6) and comprises a disc-shaped bearing bush (1), a foamed aluminum damping layer (2), a damper shell (3) and an anti-vibration pin (4); a round hole is formed in the middle of the disc-shaped bearing bush (1), and a rotary main shaft (5) of the opening bridge is clamped with the disc-shaped bearing bush (1) through the round hole; the damper shell (3) is annular, is provided with an opening at the inner side, is sleeved on the disc-shaped bearing bush (1) and is fixed through the anti-vibration pin (4); the outer side of the damper shell (3) is spaced from the edge of the disc-shaped bearing bush (1), and the outer side of the damper shell is connected with the bridge pier (6); a foam aluminum shock absorption layer (2) is arranged around the disc-shaped bearing bush (1) in the damper shell (3); when an earthquake occurs, the anti-vibration pin (4) is firstly sheared, and the main shaft (5) and the disc-shaped bearing bush (1) together squeeze the foam aluminum shock-absorbing layer (2) along any horizontal direction.
2. The Ping Zhuaikai bridge opening multidimensional damping damper according to claim 1, wherein the foamed aluminum damping layer (2) is kept in close contact with the periphery of the disc-shaped bearing bush (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320874170.7U CN219930689U (en) | 2023-04-18 | 2023-04-18 | Multidimensional damping damper of horizontal-turning open bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320874170.7U CN219930689U (en) | 2023-04-18 | 2023-04-18 | Multidimensional damping damper of horizontal-turning open bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219930689U true CN219930689U (en) | 2023-10-31 |
Family
ID=88488983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320874170.7U Active CN219930689U (en) | 2023-04-18 | 2023-04-18 | Multidimensional damping damper of horizontal-turning open bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219930689U (en) |
-
2023
- 2023-04-18 CN CN202320874170.7U patent/CN219930689U/en active Active
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